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Passive Microwave Repeaters
>>> 2025-08-16 passive microwave repeaters (PDF) One of the most significant single advancements in telecommunications technology was the development of microwave radio. Essentially an evolution of radar, the middle of the Second World War saw the first practical microwave telephone system.
Microwave stations ran over a thousand square feet, often of thick hardened concrete in the post-war climate and for more consistent temperature regulation, critical to keeping analog equipment on calibration. The list includes GTE, dozens of smaller independent telephone companies, most of the nation's major railroads, electrical utilities from the original Montana Power to the Tennessee Valley Authority. A Salem local, descended from early Microflect employees, once shared a set of photos on Facebook: a beat-up hangar with a sign reading "Aircraft Repair Center," and in front of it, stacks of aluminum panel sections.
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